New RFID Technology Allows You to be Tracked WITHOUT Your Knowledge

I recently visited a remote facility in northern Virginia to see a demonstration of NOX  a new Intelligent Perimeter Defense system deployed by the FBI that uses covert Radio-Frequency Identification (RFID) technology to track people and assets without their knowledge. What makes the NOX system I saw different from traditional security systems is that it uses RFID for clandestine surveillance: RFID readers are hidden inside w